It is good that you feel a presence all the time, I am not that fortunate, I do not feel the presence of anyone, or anything.I am aware that in my head there is an essence of God, whom I converse with a lot of time, but that is my only connection with 'God', as a Sikh I believe more in Creation, all that is around us, the game of life we play every day, every day you have the chance to be in Heaven or Hell, behaving as a good Sikh gives you a better chance of a good day, behaving as an animal lessens it
I personally do not believe in reincarnation, although there are those that do, God, or Creator does not sit there passing judgement on us all, that is an Abrahamic view, Creator lets us all get on with it, nature works her magic, sometimes it is beautiful to behold, sometimes it is destructive, deformed children come under this, the view that it is to do with Karma is a Hindu Sikh/Hindu concept that has no place in Sikhism. Guru Nanak Ji went out of his way to try and give us a way of living that did not depend on our fathers actions, or our previous life actions. Its very simple, kick a dog, it will bite you, feed it, it will lick you, it is your choice right here and right now, when we die, we are dust, and no one knows what happens after that
We are born of animals and retain the same lusts and desires that our animal ancestors had, anger, lust, all are useful, but not to be addicted to, or to be allowed to rule the roost. God does not forbid sex unless married, I am not sure where you have this from, but then, at your age, you will have a lot of misinformation about what Sikhi is all about, although I am not advocating my lifestyle, I am not legally married to my wife, and we have not had Anand Karaj, but this does not stop me from being a Sikh. I have in my youth succumbed to much lust, and it has caused me much pain both then, and in some respects 20 years after the event, it blinkers and it takes the focus away from reality, it is Maya, illusion and it suckered me in for 10-15 years, lost years, when I could have been doing something useful, instead of chasing women, drugs, money, power, pride, all wasted years. God is not a big bearded chap judging your every thought and action, again this is Abrahamic, Guruji has given you the only advice you will ever need, and it is contained in the Sri Guru Granth Sahib Ji, heed it, and be happy, ignore it and face the consequences, it makes no difference to anyone but you, this is not a test to gain entry to heaven, heaven can be yours today and now
I have cut hair, actually I have very little hair to cut, but it is, I also drink rarely, as my knowledge grows, I find myself drinking less, I find the visits to the barber more and more infrequent, not out of fear, out of understanding, I do not like the feeling of being intoxicated any more, drunkenness has eluded me for a while now, I like the feel of my hair, my beard, in time, without even realising it, I know one day I will have enough hair to put a turban on, and goo up my beard, but it will happen on its own, it is not something I focus on, I focus on the understanding that makes this happen, not results of such. As for soul reaching god, well, who cares, the idea is to live a good life on this earth right now, interact with Creation, be a friend to all, be an enemy to none, not to cheat or lie, not to take your focus away from Creator by losing yourself in the many distractions that are there to pull you away. Nothing you do is bad, as long as you learn from it, in my view
A Sikh should not fear anyone or anything, including death, and should be trained and ready to defend themself, thus the Kirpan
A Sikh should not be focused on the pleasures of the flesh, and should always be ready for any event that crops up, being stoned, being drunk, chasing women, can mean you are not ready for when your assistance is needed, the Khachera is a reminder of that
A Sikh should remember that we are all equal, a simple steel Kara reminds us of that, and also protects the sword arm
A Sikh should not change appearance to suit fashions, fashions come and go, but the truth is constant, why cut living tissue, or pierce living tissue in the name of vanity? A Sikh should be above that (the nail we cut is dead tissue, try cutting the nail that is alive 
), fashions and appearances are meaningless
However there are those that would renounce this and walk around with matted hair, ashes on faces, no clothing, this is not the spirit of Sikhi, thus the Kanga to remind us that we are also Lions and Princesses and should look smart and presentable to the rest of the world, but not gaudy and painted, it also reminds us that we are householders, soldiers, as well as saints, there are no mountain tops for us, We have to LIVE, and that is what Sikhism is all about, a guide to living happily and content and knowing the Truth. In our role as Lions and Princesses, we owe it to Creation to serve, We are Sikhs, Creator put us here to emulate the virtues of Creator without regard to creed, sex, castle, colour, lifestyle, all are in need, We must fulfil the role that we were born for, to protect and serve Creation,
my own view, hope it helps
